Abstract
A retrospective survey of 100 lower limb amputations performed for ischaemia were analysed to assess the influence of preoperative bacterial isolates and the use of prophylactic antibiotics on wound sepsis. Forty-eight per cent had previously undergone a vascular procedure to attempt limb salvage and 17% were diabetics. Benzylpenicillin was given preoperatively and continued for 5 days; diabetics received metronidazole in addition. A total of 51 isolates were obtained from 30 patients preoperatively; Staphylococcus aureus and Enterobacteriaceae each accounted for over 25%. Postoperatively, 74 isolates (20 multiple) were obtained with an overall sepsis rate of 40%. Those patients with a positive preoperative culture were significantly more likely to develop wound sepsis. There was no significant difference in wound sepsis rates for diabetics. In view of the range of organisms causing postoperative infection, we recommend prophylaxis with a broad spectrum antibiotic for amputations.
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